Sew Steady's Ruler Work Glider is a must-have tool for free motion quilting on your domestic sewing machine. Grid Gliders are equipped with a micro-suction technology that clings to your sewing machine's bed and extension table. The surface is slick, allowing quilts to glide effortlessly over it. A round cutout for the ruler's foot perfectly covers the feed dogs. This polyester mat measures 12" by 20" and can be cut down with scissors to fit your area perfectly. To help maintain your Ruler Work Glider, it's recommended that you clean it with warm water and allow it to air dry. Please note these mats are intended to stick to smooth surfaces, like acrylic or smooth plastic. If your table is textured, the mat will not adhere as well, and you will have to tape it down.